For me, spinners are a must because they move SO easily. Makes me happy

Our last cruise our friends used massive rolling duffel bags. Between their bags and their kids and having no luggage cart anywhere in sight (and no porter available at that time) meant we helped them juggle their luggage as we moved slowly through the 15 min line. I dragged one of their bags and it was dreadful - very awkward to manage. I teased them that I would not travel with them again if they didn't buy new bags! This year, as we head out for another cruise together, they bought beautiful Heys hardsided spinners.
As for me, on that cruise, I only had 1 Heys carryon spinner. My other big bags were regular softsided bags on wheels. Last Christmas, I purchased 2 black Heys hardsided 30 inch spinners (massive bags). Sears in Canada was selling them for a measly $90 apiece!! I was thrilled - and I love my bags. I also bought a cheap, no name spinner for about $60 from a flea market. One thing I noticed when I compared my cheap spinner to the Heys - the Heys is much stronger structurally. We have a luggage scale. To use, you hang the bag of a small hook. When we hang the cheap bag, the frame stretches alarmingly. With they Heys, the frame barely stretches.
One thing to realize with hardsided cases - all my bags are pretty scratched up from flying. One bag is a glossy finish in a houndstooth pattern and the other two are solid black with a textured finish. All are scratched up.
Also, I miss the pockets on my softsided bags. Now to take something out or put something in, I have to lay the bag down and unzip it, then flip it open....it's a lot more difficult to do.
On the other hand, less worries about bedbugs/rain, etc. I can lay my bags down on a hotel room carpet without any worries. I take my carryon camping because I can lay it down and leave it open and not worry about the dampness coming up through the tent.
The spinners are an absolute dream and fantasy in motion.
When it comes to keeping your stuff safe - I travelled with softsided bags for many many years - never had a problem with any of my stuff. So that's not why I switched to hardsided.